Longines Wittnauer Age Determination by Movement Number 1867 - 1969

Determine the age of your Longines watch easily by its movement number:

Longines:

Year:	No.	Year:	No.
1867	1	1919	3750000
1870	20000	1920	3815217
1871	36000	1921	3880434
1872	52000	1922	3945651
1873	68000	1923	4047100
1874	84000	1924	4148549
1875	100000	1925	4250000
1876	121425	1926	4500000
1877	142850	1927	4625000
1878	164275	1928	4750000
1879	185700	1929	4886360
1880	207125	1930	4959088
1881	228550	1931	5031816
1882	250000	1932	5104544
1883	291670	1933	5177272
1884	333340	1934	5250000
1885	375010	1935	5333330
1886	416680	1936	5416660
1887	458350	1937	5500000
1888	500000	1938	5750000
1889	550000	1939	5850000
1890	600000	1940	5950000
1891	650000	1941	6140900
1892	700000	1942	6331800
1893	750000	1943	6522700
1894	791100	1944	6713600
1895	832766	1945	6904500
1896	874432	1946	7106750
1897	916098	1947	7309000
1898	957764	1948	7511250
1899	999430	1949	7713500
1900	1124715	1950	7915750
1901	1250000	1951	8225535
1902	2083333	1952	8535320
1903	2916666	1953	8845105
1904	1500000	1954	9183125
1905	1750000	1955	9521145
1906	1850000	1956	9859165
1907	1950000	1957	10201415
1908	2100000	1958	10543665
1909	225000	1959	10885915
1910	2375000	1960	11211988
1911	2500000	1961	11538061
1912	2750000	1962	11864134
1913	2900000	1963	12116548
1914	3075000	1964	12368962
1945	3250000	1965	12621376
1916	3375000	1966	12873790
1917	3500000	1967	13839112
1918	3625000	1968	14834158

Source: Uhren Miguel / Vintage Uhren Hofrichter - below is a more precise list for each individual year:

Another identical source until 1969 - ashland.watches.com:

Date	Serial #
1867	1
1870	20,000
1875	100,000
1852	250,000
1888	500,000
1893	750,000
1899	1,000,000
1901	1,250,000
1904	1,500,000
1905	1,750,000
1907	2,000,000
1909	2,250,000
1911	2,500,000
1912	2,750,000
1913	3,000,000
1915	3,250,000
1917	3,500,000
1919	3,750,000
1922	4,000,000
1925	4,250,000
1926	4,500,000
1928	4,750,000
1929	5,000,000
1934	5,250,000
1937	5,500,000
1938	5,750,000
1940	6,000,000
1945	7,000,000
1950	8,000,000
1953	9,000,000
1956	10,000,000
1959	11,000,000
1962	12,000,000
1966	13,000,000
1967	14,000,000
1969	15,000,000

Another, probably more accurate source - millenarywatches.com:

Longines serial number production years

Below, you can find the year of production and the approx corresponding serial number format.

• 1867: 1
• 1870: 20,000
• 1871: 36,000
• 1872: 52,000
• 1873: 68,000
• 1874: 84,000
• 1875: 100,000
• 1876: 121,425
• 1877: 142,850
• 1878: 164,275
• 1879: 185,700
• 1880: 207,125
• 1881: 228,550
  
  
• 1882: 250,000
• 1883: 291,670
• 1884: 333,340
• 1885: 375,010
• 1886: 416,680
• 1887: 458,350
• 1888: 500,000
• 1889: 550,000
• 1890: 600,000
• 1891: 650,000
• 1892: 700,000
• 1893: 750,000
• 1894: 791,100
• 1895: 832,766
• 1896: 874,432
• 1897: 916,098
• 1898: 957,764
• 1899: 999,430
• 1900: 1,124,700
• 1901: 1,250,000
• 1902: 1,320,000
• 1903: 1,440,000
• 1904: 1,500,000
  
  
• 1905: 1,750,000
• 1906: 1,850,000
• 1907: 1,950,000
• 1908: 2,100,000
• 1909: 2,250,000
• 1910: 2,375,000
• 1911: 2,500,000
• 1912: 2,750,000
• 1913: 2,900,000
• 1914: 3,075,000
• 1915: 3,250,000
• 1916: 3,375,000
• 1917: 3,500,000
• 1918: 3,625,000
• 1919: 3,750,000
• 1920: 3,815,000
• 1921: 3,880,000
• 1922: 3,945,000
• 1923: 4,047,100
• 1924: 4,148,000
• 1922: 3,945,000
• 1923: 4,047,000
  
  
• 1924: 4,148,000
• 1925: 4,250,000
• 1926: 4,500,000
• 1927: 4,625,000
• 1928: 4,750,000
• 1929: 4,886,000
• 1930: 4,959,000
• 1931: 5,031,000
• 1932: 5,104,000
• 1933: 5,177,000
• 1934: 5,250,000
• 1935: 5,333,000
• 1936: 5,416,000
• 1937: 5,500,000
• 1938: 5,750,000
• 1939: 5,850,000
• 1940: 5,950,000
• 1941: 6,140,000
• 1942: 6,331,000
• 1943: 6,522,000
• 1944: 6,713,000
• 1945: 6,904,000
• 1946: 7,106,000
• 1947: 7,309,000
• 1948:  7,511,000
• 1949: 7,713,000
• 1950: 7,915,000
• 1951: 8,225,000
• 1952: 8,535,000
• 1953: 8,845,000
• 1954: 9,183,000
• 1955: 9,521,000
• 1956: 9,859,000
• 1957: 10,201,000
• 1958: 10,543,000
• 1959: 10,885,000
• 1960: 11,211,000
• 1961: 11,538,000
• 1962: 11,864,000
• 1963: 12,368,000
• 1965: 12,621,000
• 1966: 12,873,000
• 1967: 13,839,000
• 1968: 14,834,000
• 1969: 15,000,000

Source: Uhrenforum.de, thewatchguy.com, millenarywatches.com